-93.87% is the change from 489 to 30
Calculation steps:
[( 30 - 489 ) ÷ 489] x 100 = -93.87%
Formula
Percentage change = [(30 - 489) / 489] x 100
Subtract the new number by the original number
30 - 489 = -459
-459 ÷ 489 = -0.9386503067484663
-0.9386503067484663 x 100 = -93.87%